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Title: An aerial radiological survey of the neutron products company and surrounding area

An aerial radiological survey of the neutron products company and surrounding area An aerial radiological survey was conducted from November 1-10, 1993, over the Neutron Products Company and neighboring areas. The company, located in Dickerson, Maryland, has two major operations involving the radioisotope cobalt-60 ({sup 60}Co)-the manufacture of commercial {sup 60}Co sources and the sterilization of medical products by exposure to radiation. The sterilization facility consists of two {sup 60}Co sources with activities of approximately 500,000 and 1,500,000 Ci, respectively. The purpose of the aerial survey was to detect and document any anomalous gamma-emitting radionuclides in the environment which may have resulted from operations of the Neutron Products Company. The survey covered two areas: the first was a 6.5- by 6.5-kilometer area centered over the Neutron Products facility; the second area was a 2- by 2.5-kilometer region surrounding a waste pumping station on Muddy Branch in Gaithersburg, Maryland. This site is approximately fifteen kilometers southeast of the Neutron Products facility and was included because sanitary and other liquid waste materials from the plant site are being disposed of at the pumping station. Contour maps showing gamma radiation exposure rates at 1 meter above ground level, overlaid on an aerial photo of the area, were constructed from the data measured during the flights. more » The exposure rates measured within the survey regions were generally uniform and typical of rates resulting from natural background radiation. Only one area showed an enhanced exposure rate not attributable to natural background. This area, located directly over the Neutron Products facility, was analyzed and identified as {sup 60}Co, the radioisotope used in the irradiation and source production operations conducted at the Neutron Products Company. The measurements over the Muddy Branch area in Gaithersburg were typical of natural background radiation and showed no evidence of {sup 60}Co or any other man-made radionuclide. « less
Authors:
Publication Date:
OSTI Identifier:10116641
Report Number(s):EGG--11265-1081
ON: DE95007553; TRN: 95:001830
DOE Contract Number:AC08-93NV11265
Resource Type:Technical Report
Resource Relation:Other Information: PBD: Dec 1994
Research Org:EG and G Energy Measurements, Inc., Las Vegas, NV (United States). Remote Sensing Lab.
Sponsoring Org:USDOE, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 54 ENVIRONMENTAL SCIENCES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; NEUTRON SOURCES; NUCLEAR FACILITIES; RADIOSTERILIZATION; AERIAL SURVEYING; RADIATION MONITORING; SOILS; CONTAMINATION; GAMMA RADIATION; MARYLAND; COBALT 60 540230; 053000; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT; ENVIRONMENTAL ASPECTS